MAX users on Squid

[mkaabiq8]

Dear All
  am using Pfsense for a small business with 20mbps internet speed, cache is working fine but the memory (RAM) when almost full it donset cache any more , unless i reboot ,

-  is there any other way to clear the RAM Cache/? 
-  what the MAX users can the squid handle ,
-  will pfsense work with 1or2 GB internet speed.?

Thanks
Mohsen

[KOM]

Restarting the process with squid -k reconfigure may do it by I have never tried.

There is no max users.  It's based on the available resources and load.

The CPU use scales with the network load.  The pfSense appliances come with Gigabit interfaces, so you are limited to that unless you're doing some virtual config with VMX3 NICs.  Supermule has a high bandwidth connection and may be able to give more information.